Merge pull request #370 from Jian-Zhang/0.4.2

0.4.2 release include Aliyun OSS support.

add sample config files

Signed-off-by: ywang19 <yaguang.wang@intel.com>

Update README.md

Add another tool which helps visualize COSBench results.

fix the issue which causes keystone authentication context has been i…

…gorned

Signed-off-by: ywang19 <yaguang.wang@intel.com>

update user guide to cover starting multiple driver procedure

Signed-off-by: ywang19 <yaguang.wang@intel.com>

add one workload whose distribution is summarized from two week's tra…

…ce on ASUS WebStorage

Signed-off-by: ywang19 <yaguang.wang@intel.com>

update version to 0.4.1

Signed-off-by: ywang19 <yaguang.wang@intel.com>

fix issue 198 - afr

update the sample of storage policies section

Merge pull request #181 from intel-cloud/0.4.0.0

merge commits from 0.4.0.0